Major System Problems

I have had a lot of system problems lately. It is a new build and the system will run for 3 days and all of a sudden I will get the following error:
STOP:0x0000009C (0x00000004, 0x00000000, 0xb2000000, 0x00020151) "MACHINE_CHECK_EXCEPTION"

So today I tool 512K RAM out and started the system up and got a CPU Clocking was off (Not exactly sure of the message) Over clocking I had to go into BIOS but I didn't change any settings. Now I am in XP Professional and it seems to be ok.
Does anyone know anything about what problems I may be having? Why when I take out 1 bank of RAM I would get a clocking or overclocking problem? Is there a bios setting I need to fool with? I think my clocking setting is set to AUTO in Bios
I have purchased an APC UPS so all the lines are clean from little glitches.
I didn't checj the powersupply as of yet.
I am currently swapping out the RAM 512 at a time
The RAM is compatable, I checked with Kingston.


This clocking message bothers me a bit. Not sure what it means but as soon as I took out 1 bank of ram I got the message. I was asked to do an F1 and fix settings but it was way over my head so I tried rebooting and that worked. Havn't had it happen for a 2 hours now and I have rebooted a few times.
My CPU clocking is set to Auto is that typical? Would there be any other BIOS settings that may help?

Thanks
Steve

 

Here is an article in microsoft about it: http://support.microsoft.com/?kbid=329284

Here are the possible causes it mentions:

System bus errors
Memory errors that may include parity or Error Correction Code (ECC) problems
Cache errors in the processor or hardware
Translation Lookaside Buffers (TLB) errors in the processor
Other CPU-vendor specific detected hardware problems
Vendor-specific detected hardware problems

Can't help you any further than that.

CoolerMaster